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Jeffrey Lee authored
MaxCamEntry32 is an internal variable which the kernel can use to quickly determine whether a RAM page has a 32bit physical address or something larger, by comparing with the physical page number (currently entries in PhysRamTable are sorted such that all 32bit pages come first) CPUFlag_HighRAM (aka OS_PlatformFeatures 0 bit 21) is a flag that external code can use to detect whether any high RAM is present, and thus whether 64bit physical address APIs should be preferred over 32bit ones (once the new APIs are implemented!). Using APIs which only support 32bit physical addresses will result in functionality being limited.
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